Table 5.
Presentation of serial interval parameters, incubation period, and transmissibility period.
| Author, year [references] | Country | Study date | Characteristics of the sample (sample, age, and sex) | Incubation period | Transmissibility period | Serial interval |
|---|---|---|---|---|---|---|
| Linton et al., 2020 (14) | China | January 2020 | N = 158 cases; predominance of age group 30–39 years; Female sex: 42% | Mean: 5.6. (95%CI: 5.0–6.3 days). |
– | – |
| Song et al., 2020 (33)* | China | January 2020 | No information | Mean: 5.01. (95%CI: 4.31–5.69 days). |
– | – |
| Pung et al., 2020 (36) | Singapore | February 2020 | N = 36 cases; 17 positive cases; Age [median (IQR)]: 40 (36–51) years; Female sex: 59% | Median: 4 days (IQR: 3–6 days). |
– | Range: 3–8 days |
| Chan et al., 2020 (37) | China | January 2020 | N = 6 cases; 5 adults and one child, Age (mean): 45 years; Female sex: 50% | Range: 3–6 days | – | – |
| Lauer et al., 2020 (38) | 50 places in and outside China | January and February 2020 | N = 181 cases; Age [median (IQR)]: 44.5 (34–55,5) years; Female sex: 38% | Median: 5.1 days (95%CI: 4.5–5.8 days). |
– | – |
| Fan et al., 2020 (39) | China | January and February 2020 | N = 54 cases; Age [mean (lower and upper limits)]: 38 (1, 67–94) years; Female sex: 33.3%; 19 cases subsidized the estimated incubation period | Mean: 6.7 days | – | – |
| Yang et al., 2020 (40)* | China | January and February 2020 | N = 325 cases | Median: 7 days; Mode: 4 days Range: 1–20 days |
– | – |
| Backer et al., 2020 (41) | China | January 2020 | N = 88 cases; Age (lower and upper limits): 2–72 years; Female sex: 35.2% | Mean: 6.4 days (95%CI: 5.6–7.7 days). |
– | – |
| Hu et al., 2020 (42) | China | January and February 2020 | N = 24 cases; Age [median (IQR)]: 32.5 (19.0–57.0) years; Female sex: 77.7% | – | Median: 9.5 days (IQR 3.5–13.0 days) |
|
| Li et al., 2020 (26) | China | January 2020 | N = 425 cases; Age [median (lower and upper limits)]: 59 (15–89) years; Female sex: 49%; 10 cases subsidized the estimated incubation period, and 6 pairs subsidized the serial interval calculation | Mean: 5.2 days (95%CI: 4.1–7.0 days) |
– | Mean (SD): 7.5(±3.4) days (95%CI: 5.3–19 days) |
| Wu et al., 2020 (43)* | China | January 2020 | N = 40 cases; 35% of the aged over 60 years | Median: 6 days | – | – |
| Zhang et al., 2020 (44)* | China | January 2020 | N = 17 cases; Age [median (lower and upper limits)]: 55 (19–79) years; Female sex: 23.5% | Median: 4 days Range: 0–12 days |
– | – |
| Ki and Task Force for 2019-nCoV, 2020 (30) | South Korea | January and February 2020 | N = 28 cases; Age [median (lower and upper limits)]: 42 (21–73) years; Female sex: 46.4% | Mean: 3.9 days Median: 3 days |
– | Mean: 6.6 days; Median: 4 days |
| Nishiura et al., 2020 (45) | China | February 2020 | Data from articles and reports: 28 pairs. | – | – | Median: 4.6 days (95%CI: 3.5–5.9 days) |
| Lian et al., 2020 (46) | China | Between January 17 and February 12, 2020 | N = 778 cases, divided into elderly group, with 136 cases and mean age of 68.28 years; and non-elderly adult group with 652 cases and mean age of 41.15 years. | Median: 5 days (IQR: 2–9 days) |
– | – |
| Sun et al., 2020 (15) | China | January 2020 | N = 33 cases | Median: 4.5 days (IQR: 0–5.5 days) Maximum: 9.5 days |
– | – |
| Jia et al., 2020 (47) | China | Between January and February 2020 | N = 44 cases; Age [median (lower and upper limits)]: 46 (1 and 90 years); Female sex: 65.9% | Mean: 6.28 days Range: 1–14 days |
– | – |
| Du et al., 2020 (31) | China | Between January and February 2020 | N = 468 cases | – | – | Mean: 3.96 (95%CI: 3.53–4.39 days) SD ± 4.75 days (95%CI: 4.46–5.07 days) |
| Guan et al., 2020 (48) | China | Between December 2019 and January 2020 | N = 1,590 hospitalized patients; Mean age: 48.9 (SD ± 16.3) years; Female sex: 42.7% | Mean: 3.6 days (SD ± 4.2 days) |
– | – |
| Jin et al., 2020 (49) | China | Between January and February 2020 | N = 651, divided into group with gastrointestinal symptoms (GI) (N = 21), Age [mean (SD)]: 46.14 ± 14.19 years; Female sex: 50%; and asymptomatic group GI (N = 577), Age [mean (SD)]: 45.09 ± 14.45 years; Female sex: 49.05% | With GI symptoms: median: 4 days (IQR: 3–7 days). With no GI symptoms: median: 5 days (IQR: 3–8 days) |
– | – |
| Sun et al., 2020 (50) | China | Between January and February 2020 | N = 8 children; Age (lower and upper limits): 2 months to 15 years; Female sex: 25% | Range: 5–10 days | – | – |
| Guan et al., 2020 (51) | China | Up to January 2020 | N = 1,099; Age (median): 47 (IQR 35–58) years; Female sex: 41.9% | Median: 4 days (IQR: 2–7 days) |
– | – |
N: total number of participants in the study.
GI: gastrointestinal symptoms.
95%CI: 95% confidence interval.
IQR: Interquartile range.
SD: Standard deviation.
*
Article in Chinese, only the abstract in English was assessed.